JP2913534B2 - Lift hinge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift hinge for a flipper door which is used to mount a door to a cabinet or other door mounting body so that the door can be freely opened and closed in a vertical direction.

[0002]

2. Description of the Related Art Conventionally, as the hinge, as shown in FIGS. 6 and 7, a fixed link c attached to an upper inner surface of a side plate b of a door mounting body a, and a hinge attached to an upper inner surface of a door d. The movable link e constitutes a four-bar link (lever crank mechanism) rotatably connected by a long link f and a short link g, and furthermore, between the fixed link c and the movable link e. A tension spring h is stretched, so that the door d can be freely opened and closed in a vertical direction by a rotation operation, and the tension spring h allows the door d to open and close in the opening direction and the closing direction, respectively. Further, there is known an apparatus in which a door d can be freely opened and closed by energizing a door closing force.

As shown in FIG. 8, when the door d is opened, as shown in FIG. 8, when the door d is slightly opened, a door opening force i based on a tension spring h is applied to the door d. When the door d is closed to the same position as above, a closing force j by a tension spring h is applied, and the door is automatically closed. It is done.

Immediately before the opening force i and the closing force j are exerted, the turning force due to the spring force of the tension spring h becomes zero, but this position is changed to the opening force i and the closing force. j, the opening angle α at this branch point A
Is based on the conventional product shown in FIG. 6 and FIG.
A narrow angle of about 10 degrees is set. That is, as is clear from the power torque curve B by the tension spring h shown in the graph of FIG. 10, the hinge is set in the closed state by setting the opening angle α at the branch point A to a narrow angle. The door closing force j does not become unnecessarily large, so that a large force is not required for the door opening operation.

[0005]

However, in the above-mentioned conventional lift hinge, as shown in FIG.
When the door is closed, the closing operation must be performed over a considerable wide angle from the opening position C to the position beyond the branch point A against the opening force i by the tension spring h. d is not easy to close.

Therefore, as shown in FIG. 9, the branch point A '
If the door opening angle β is made to be a wide angle, it is possible to improve the closing easiness of the door d. For this purpose, in FIG. 6 and FIG. The locking point D, that is, the point where the power is generated by the tension spring h, is indicated by E, which is closer to the door d, as shown by a two-dot chain line in the figure.
What is necessary is just to shift to the point D 'on the point side.

However, when the hook point D of the tension spring h is shifted to the point D ', a power torque curve B' is obtained as understood from FIG. Although no problem occurs for i, the door closing force j is extremely increased, and the door opening operation becomes practically impossible.

In view of the above-mentioned problems of the prior art, according to the present invention, in the four-link mechanism, the movable link is provided at a position where the branch point can be widened. One end of the separately prepared link is rotatably pivoted, and the other end is hooked with one end of a tension spring,
Until the door is in the closed state from the branch point, the link is engaged with the tension spring, and the pivotal connection point between the long link and the movable link that rotatably connects the movable link and the fixed link. Are held at the same position or on the same straight line, so as to provide a rotation stop for the link, thereby increasing the closing force by the tension spring without increasing the closing force in the closed state. It is an object of the present invention to widen the opening angle at a branch point between the closing force and the door closing force, thereby improving the closing ability of the door.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, a point of engagement of the tension spring in the fixed link is provided near a pivot point between the fixed link and the long link. Thus, the above-described closing force can be further reduced.

[0010]

According to the present invention, in order to achieve the above object, according to the present invention, a fixed link attached to a side plate of a door mounting body and an upper back surface of a door are attached. The movable link is rotatably connected to the movable link by a long link and a short link so that the door can be opened and closed in the vertical direction by rotating, and a tension spring stretched between the fixed and movable links. In a lift hinge in which a door opening force and a door closing force are respectively urged, the movable link is moved so that a branch point between the door opening force and the door closing force by the tension spring has a wide angle in a door opening direction. One end of the link is pivotally connected to a position where the tension of the tension spring is increased, and the above-mentioned tension spring is hooked to the other end. The point of engagement with the spring and the movable As the pivot point of the link of link and long is held at the same position or on the same straight line, it is trying to provide a lift hinge, characterized in that a rotation stop of the link.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, in the fixed link, a tension spring is provided near a pivot point between the fixed link and the long link. Its contents.

[0012]

[Function] When the lower end of the door is closed in the suspended state, and the door is pulled up against the closing force of the tension spring, the lifting force is applied to the movable link and rotated in the opening direction. Since the movable link is transmitted as a force, the movable link is rotated to the front side of the door mounting body around the pivot point with the long and short links, and at this time, both the long and short links are Each of the links is pivoted toward the outside of the door mounting body about a pivot point with the fixed link to which the pivot is attached, whereby the link is pivoted to the movable link by the tension of the tension spring. The door is rotated about the landing point in a direction to open the door upward.

When the door is opened to a position slightly beyond a branch point between the opening force and the closing force of the tension spring (dead center of the tension spring), the door opening force by the tension spring is transmitted via the link and the movable link. And the door is opened upward in front of the door, so that the door is opened at a predetermined angle.

When the door has the front end from the above-mentioned opened state and is pushed down against the opening force of the tension spring, the pushing force is applied to both the long and short links via the movable link. At the time of opening, it is applied as a rotational force in the opposite direction, so both the long and short links rotate around the pivot point of the movable link and the fixed link, and from the state where they are projected forward and inclined, It is rotated in the direction of the state.

When the door is closed to a position slightly beyond the branch point, the closing force of the tension spring is applied to the door via the link and the movable link. Thereafter, the door is closed by the closing force. , And the door is closed.

In the above-described door closing operation, when the door is closed to a branch point between the opening force and the closing force, the pivot point between the movable link and the long link, and the link between the link and the extension spring. At the same position where the hooking point overlaps or on the same straight line, the rotation of the link is stopped by the rotation stop, and the door is closed to the closed state in this state. As a result, the tension applied to the door by the tension spring is suppressed, so that the door closing force is reduced as compared with the conventional example.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to a first embodiment shown in the drawings. As shown in FIGS. 1 to 3, a fixed link 1 has a cross section of a back wall 1a and left and right side walls 1b and 1b. It has a substantially U-shape and is formed to be long in the vertical direction,
It is located on the upper inner surface of the side plate 2a of the door mounting body 2 such as a cabinet, and is fixed to the opening 2b by a set screw (not shown).

The movable link 3 comprises a front wall 3a and left and right side walls 3
b, 3b, are formed to have a substantially U-shaped cross section and elongated in the vertical direction, and brackets 3c, 3c are extended rearward and parallel from upper ends of the left and right side walls 3b, 3b, The door 4 is fixed to the inner surface of the hanging side by set screws 5.

The fixed link 1 and the movable link 3 are rotatably connected by a long link 6 and a short link 7. The long link 6 includes a front wall 6a and left and right side walls 6a.
b, 6b are formed so as to have a substantially U-shaped cross section and elongated in the up-down direction, and the lower ends of the left and right side walls 6b, 6b are connected to the left and right side walls 1b, 1
The lower end of each side wall 1b, 1b is rotatably supported by a support shaft 8, and the upper ends of the side walls 6b, 6b are located on both brackets 3c, 3c of the movable link 3. , Is rotatably supported by support shafts 9 and 9 at a lower portion near the base.

On the other hand, the short link 7 has a back wall 7a.
The left and right side walls 7b, 7b have a central portion having a substantially U-shaped cross section, and the length in the vertical direction is set to the length of the long link 6.
Is formed to be about half shorter than that of
Left and right side walls 7b, 7b are bent to the back at the lower part,
The whole is formed in a substantially rectangular shape on the side, and the lower ends of the left and right side walls 7b, 7b are
b, 1b, rotatably supported by a support shaft 10 near the back wall 1a at the upper part thereof, and the upper ends of the left and right side walls 7b, 7b are connected to both brackets 3c, 3c of the movable link 3 described above. The door 4 is pivotally supported by the support shafts 11 and 11 at the upper end thereof so as to be rotatable, so that the door 4 is pivotally supported by the door mounting body 2 so that the opening 2b thereof can be freely opened and closed. Becomes

A tension spring 12 for obtaining the opening force and the closing force of the door 4 is provided at the lower end thereof as shown in FIG.
The adjusting member 13 having the screw hole 13a penetrated at the center,
It is fixed by screwing, as clearly shown in FIGS. 1 and 2,
A through-hole 1d is formed in a support plate 1c provided at the center of the lower end of the left and right side walls 1b, 1b of the fixed link 1,
The adjusting screw 14 is inserted from below into the screw hole 1.
3a, the tension spring 10 pivots on the rear side of the long link 6 so that the lower end of the tension spring 10 is rotatable in the front-rear direction (the left-right direction in FIGS. 1 and 2). Have been. A hook 12a is bent at the upper end of the tension spring 12, and is hooked on a link 15 described later.

The link 15 has a bottom surface 15a and a front surface 1a.
5b is approximately 90 °, and is formed in a thick wall shape with a substantially right-angled isosceles triangle having a side surface of approximately 90 °. As shown in FIG. In order to form a wide angle of .degree., The vicinity of the apex is located between the left and right brackets 3c, 3c of the movable link 3 and at the upper end on the base side of both brackets 3c, 3c. It is pivoted freely. This link 15 has a pin hole 1 formed in a rear end at a lower end thereof.
5c, a pin 17 is fixed in a driving state, and the hook 17 at the upper end of the tension spring 12 is fixed to the pin 17 as described above.
2a is hung.

In this embodiment, the pivot point F (center of the support shaft 16) between the link 15 and the movable link 3 and the tension spring 1
2, the length l to the locking point G (center of the pin 17), the pivot point F, and the pivot point H (center of the support shaft 9) between the movable link 3 and the long link 6 The length l 'is formed to be the same, so that as shown in FIG. 2, when the door 4 is in the opened state, the above-mentioned hook point G and the pivot point H are separated by a predetermined distance. When the door 4 is closed, the door 4 is gradually approached, and the door 4 is closed to the above-mentioned branch point A ′ shown in FIG. The door 4 is matched in this state.
Is closed, the door closing force j by the tension spring 12 is set.
Will be reduced.

In order to keep the hook point G and the pivot point H coincident with each other, the link 15 is prevented from rotating at a position where the door 4 is closed to the branch point A '. The rotation stop 18 for the link 15
However, in the illustrated embodiment, the movable link 3 is formed on the movable link 3, but at this time, the rotation stopper 18 may not be provided on the lift hinge itself, and the door 4 to which this is attached may be used. That is, as the rotation stopper 18 in this embodiment, the inner surface of the front wall 3a of the movable link 3
1, the clockwise rotation in FIG. 1 is stopped by the front surface 15b of the link 15 being abutted, but the rotation stopper 18 may be provided at another appropriate position. , Of course.

Here, the graph of FIG. 10 shows a power torque curve B ″ based on the tension spring 12 of the hinge of the present invention.
Are also shown together with the power torque curves B and B 'of the conventional example and the study example described above. As is apparent from this, in the hinge of the present invention, the opening angle of the branch point A' is 30 degrees.
Despite being set to a wide angle of °, the closing force j in the closed state is as small as the conventional example.

FIGS. 4A and 4B are schematic views of a second embodiment of the present invention, in which FIG. 4A shows a state where the door is open, FIG. 4B shows a state at a branch point A 'during opening and closing, and FIG. Each is shown. Here, the case where the movable link 3 <the link 15 in the length dimension is shown, and the rotation stopper 1 of the link 15 is provided on one side of the movable link 3.
8 is erected, the rotation is stopped by one end face of the link 15 being hooked to the rotation stopper 18, and at this time, a pivot point H between the long link 6 and the movable link 3, not shown, The hook G of the link 15 and the tension spring 12 is configured to be held on the same straight line.

In the open state (A), a rotating force is applied clockwise about the pivot point H to the movable link 3 by the tension spring 12 to apply a door opening force i.
In the state at the branch point A 'in (B), the rotational force based on the spring force of the tension spring 12 is zero. In the closed state (C), the movable link 3 is pivotally connected to the pivot point H by the tension spring 12.
Is applied in the clockwise direction with respect to the same as in the state (A) described above.

FIGS. 5A and 5B are schematic views showing a third embodiment of the present invention, in which FIG. 5A shows a door open state, FIG. 5B shows a state at a branch point A ', and FIG. Show. Here, the case where the length dimension is the movable link 3> the link 15 is shown, and the rotation stop 18 of the link 15 is formed on the movable link 3.

The state of opening the door (A) and the state at the branch point A 'in (B) are the same as those of FIGS. 4A and 4B, and the state of the movable link in the closed state of (C). 3 is urged to rotate counterclockwise about the pivot point H to apply a door closing force j. As described above, even when the lengths of the movable link 3 and the link 15 are different, the same function can be achieved as when the movable link 3 and the link 15 are formed to have the same length.

Further, as shown in FIGS. 1 and 2,
The lower end of the tension spring 12 is hooked to the fixed link 1 in the vicinity of a pivot point I (center of the support shaft 8) between the fixed link 1 and the long link 6, whereby the pivot is fixed. By reducing the dimension L between the attachment point I and the hook point J at the lower end of the extension spring 12, the door closing force j by the extension spring 12 is reduced.

Further, the lower end of the tension spring 12 is hung so as to be movable in the front-rear direction with respect to the fixed link 1 so that the dimension L can be adjusted arbitrarily.
It is also possible to configure so that the door closing force j can be adjusted. Here, when the dimension L is increased, the door closing force j increases, and when the dimension L is decreased, the door closing force j decreases. If the dimension L is set to 0, the door closing force can be set to 0.

[0032]

Since the present invention is constructed as described above, according to the first aspect, the opening angle of the door at the branch point between the opening force and the closing force by the tension spring is adjusted. The door can be widened and the door closing force can be reduced, so that the door can be easily opened and closed, and only one link needs to be added to the existing hinge. Since it can be simple, it can be provided easily, easily and relatively inexpensively.

According to the second aspect of the present invention, since the door closing force can be further reduced, the door can be closed gently, so that there is no danger of pinching a finger or the like between the door and its mounting body. The door can be opened lightly with a small force without damaging the mounting body.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a first embodiment of a lift hinge according to the present invention, in which a part of a closed state in a use state is cut away.

FIG. 2 is a vertical sectional side view in which a part of a door is opened in a use state of the embodiment.

FIG. 3 is an exploded perspective view showing the embodiment.

4A and 4B show a second embodiment of the lift hinge according to the present invention, and FIG.
Fig. 3 is a schematic view of an open door state, (B) is a schematic view of a branch point in the middle of opening and closing the door, and (C) is a schematic view of a closed state of the door.

5A and 5B show a third embodiment of the same lift hinge, and FIG.
Fig. 3 is a schematic view of an open door state, (B) is a schematic view of a branch point in the middle of opening and closing the door, and (C) is a schematic view of a closed state of the door.

FIG. 6 is a vertical sectional side view showing a conventional lift hinge in a closed state in a use state in which a part is cut away.

FIG. 7 is a longitudinal sectional side view in which a part of a door opening state in a use state showing the lift hinge is cut away.

FIG. 8 is an explanatory side view of the lift hinge in a state of use showing the same.

FIG. 9 is an explanatory side view according to the present invention when a door opening angle at a branch point in the middle of opening and closing the door is widened.

FIG. 10 is a graph showing power torque curves of a lift hinge according to the present invention, a conventional lift hinge, and a lift hinge as a product under study, which are obtained by a tension spring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed link 2 Door mounting body 2a Side plate 3 Movable link 4 Door 6 Long link 7 Short link 12 Tension spring 15 Link 18 Rotation stop A 'Branch point G Lock point J Lock point H Pivot point i Open door Force j closing force

Claims (2)

(57) [Claims] 1. A fixed link attached to a side plate or the like of a door mounting body and a movable link attached to an upper back surface of a door or the like are long so that the door can be freely opened and closed in a vertical direction by turning. And a short link, the link being rotatably connected to the fixed hinge and the movable link, and tensioning springs stretched between the fixed and movable links to urge a door opening force and a door closing force, respectively. One end of the link is pivotally attached to the movable link at a position where the tension of the tension spring is large so that the branch point between the door opening force and the door closing force has a wide angle in the opening direction of the door. At the other end, the above-described tension spring is hooked, and at the branch point at the time of the door closing operation, a hook point between the link and the tension spring, and a pivotal connection point between the movable link and the long link. Are held in the same position or on the same straight line A lift hinge provided with a rotation stopper for the link so that the link can be rotated. 2. A long link between a fixed link attached to a side plate or the like of a door mounting body and a movable link attached to an upper back surface of a door or the like so that the door can be opened and closed in a vertical direction by turning. And a short link, the link being rotatably connected to the fixed hinge and the movable link, and tensioning springs stretched between the fixed and movable links to urge a door opening force and a door closing force, respectively. One end of the link is pivotally attached to the movable link at a position where the tension of the tension spring is large so that the branch point between the door opening force and the door closing force has a wide angle in the opening direction of the door. At the other end, the tension spring is hooked, and at the branch point at the time of the door closing operation, a hook point between the link and the tension spring, and a pivot point between the movable link and the long link. Are held in the same position or on the same straight line. So that a rotation stop of the link is provided, and a locking point of a tension spring is provided in the fixed link near a pivotal connection point between the fixed link and the long link. And lift hinge.